Year	US Dollars adjusted for inflation)
1960	113000000
1961	27000000
1962	181000000
1963	227000000
1964	418000000
1965	518000000
1966	401000000
1967	442000000
1968	591000000
1969	399000000
1970	561000000
1971	474000000
1972	501000000
1973	539000000
1974	683000000
1975	646000000
1976	295000000
1977	349000000
1978	298000000
1979	643000000
1980	523000000
1981	475000000
1982	445000000
1983	284000000
1984	240000000
1985	330000000
1986	455000000
1987	214000000
1988	192000000
1989	275000000
1990	606000000
1991	63000000
1992	185000000
1993	14000000
1994	29000000
1995	2000000
1996	39000000
1997	61000000
1998	170000000
1999	142000000
2000	21000000
2001	24000000
2002	21000000
2003	17000000
2004	285000000
2005	436000000
2006	60000000
2007	97000000
2008	76000000
2009	56000000
2010	107000000
2011	80000000
2012	21000000
2013	20000000
2014	0
2015	22000000
2016	177000000
2017	88000000
2018	35000000
2019	13000000
2020	189000000
2021	183000000
2022	126000000